html,
body,
#app {
    height: 100%;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

::-webkit-scrollbar {
    width: 8px;
    background-color: #f1f1f1;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background-color: #cacaca;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background-color: #999;
}